how can i break a dog from fighting

Only problem with the shock collar is he will not associate the correction with you...I know you don't want to get physical with him, but you have to get his attention and be consistent just like it was one of your kids...I have a male with the same problem and he is fine as long as I am consistent...He knows he will get the azz whooping of his life if he tries me....works for me and is what he understands..Think about it, what would the leader of the pack do to him in the wild? ask him to please quit that? I don't think so..